RANKING · 2024 ACS · 57 SHOWN OF 57

Highest Welsh population share, California counties

California counties ranked by the share of all residents who are Welsh ancestry (2024 American Community Survey). A concentration measure: Welsh residents as a percentage of total population. This list covers the 57 counties in California that qualify, ranked against each other statewide. The median across all 57 is 0.4%. Biggest climber in the top 100 since 2020: Glenn County, CA, up 25 places to #23.

Welsh Americans: full group profile →

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SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPWELSH SHAREVS 2010

01▲3Trinity County, CACA15,7202.1%−0.7 pts

02▲1Inyo County, CACA18,1581.9%+0.8 pts

03▲9Lassen County, CACA28,1170.9%+0.2 pts

04▲1Tuolumne County, CACA53,1600.9%+0.1 pts

05▲6Lake County, CACA67,7720.9%−0.2 pts

06▲3Calaveras County, CACA46,6050.9%−0.4 pts

07▲1Mariposa County, CACA16,9180.8%+0.1 pts

08▼1Humboldt County, CACA131,6470.8%0.0 pts

09▲12Sonoma County, CACA486,4440.8%−0.1 pts

10▲6San Luis Obispo County, CACA282,3670.8%−0.2 pts

11▲13Santa Cruz County, CACA258,8520.8%−0.2 pts

12▲3Placer County, CACA442,0810.7%−0.1 pts

13▲9Shasta County, CACA181,6480.7%−0.2 pts

14▲12Marin County, CACA253,6940.7%−0.2 pts

15▲3Modoc County, CACA8,4260.7%−0.7 pts

16▲7Mendocino County, CACA88,1220.7%−0.6 pts

17▲10Napa County, CACA132,9490.6%−0.2 pts

18▼8El Dorado County, CACA192,3230.6%−0.5 pts

19▲1Butte County, CACA209,2110.6%−0.2 pts

20▼19Sierra County, CACA3,0980.6%–

21▼15Plumas County, CACA18,5830.5%−0.2 pts

22▲7Tehama County, CACA64,6650.5%−0.1 pts

23▲25Glenn County, CACA28,1410.5%−0.1 pts

24▼7Nevada County, CACA101,9110.5%−1.0 pts

25▲6Santa Barbara County, CACA442,0650.5%−0.4 pts

26▲4Contra Costa County, CACA1,170,0700.4%−0.2 pts

27▼2Siskiyou County, CACA42,0130.4%−0.6 pts

28▲6San Diego County, CACA3,282,2480.4%−0.2 pts

29▲3Sacramento County, CACA1,618,4600.4%−0.3 pts

30▲10San Francisco County, CACA826,0790.4%−0.1 pts

31▲2Ventura County, CACA830,8510.4%−0.2 pts

32▲3San Benito County, CACA70,0820.4%0.0 pts

33▼19Amador County, CACA41,8760.4%−0.2 pts

34▲3Stanislaus County, CACA557,7190.4%−0.2 pts

35▼33Mono County, CACA12,5050.4%−0.2 pts

36▼17Yuba County, CACA88,6910.4%−0.3 pts

37▲2Solano County, CACA455,3760.4%−0.1 pts

38▼25Del Norte County, CACA26,4100.4%−0.1 pts

39▼3Orange County, CACA3,149,5070.4%−0.2 pts

40▲6Monterey County, CACA433,7290.3%−0.2 pts

41▲2San Mateo County, CACA743,5680.3%−0.1 pts

42Riverside County, CACA2,544,9160.3%−0.2 pts

43▼2Kern County, CACA927,0680.3%−0.1 pts

44Alameda County, CACA1,636,6300.3%−0.1 pts

45▼7Yolo County, CACA224,4100.3%−0.4 pts

46▲3Tulare County, CACA485,1460.3%0.0 pts

47Merced County, CACA297,2600.3%0.0 pts

48▲2Madera County, CACA167,9270.2%−0.3 pts

49▲4San Joaquin County, CACA823,8150.2%−0.1 pts

50▲2San Bernardino County, CACA2,224,0910.2%−0.2 pts

51▲4Fresno County, CACA1,035,4560.2%−0.2 pts

52▼7Santa Clara County, CACA1,914,3910.2%−0.3 pts

53▲3Los Angeles County, CACA9,694,9340.2%−0.1 pts

54▼26Sutter County, CACA98,7870.2%−0.3 pts

55▼4Kings County, CACA154,3270.1%−0.2 pts

56▲1Imperial County, CACA181,4110.0%−0.2 pts

57▼3Colusa County, CACA21,8360.0%−0.2 pts

SHOWING 1–57 OF 57

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES